TrueTypeGlyphOutlines Class

Namespace: Meziantou.Framework.Fonts
Assembly: Meziantou.Framework.Fonts.dll
Package: Meziantou.Framework.Fonts 1.0.9
Source: TrueTypeGlyphOutlines.cs
Available in package assets: net10.0net11.0

The TrueType outlines of the glyf and loca tables of a font program that FontLoader cannot load because it lacks tables, such as the programs embedded in PDF documents (/FontFile2), which often have only the tables a PDF reader needs (ISO 32000-2, 9.9).

public sealed class TrueTypeGlyphOutlines

Remarks

The outlines are those of the default instance of a variable font. The object is immutable and can be used from several threads.

Constructors

Name	Description
TrueTypeGlyphOutlines(ReadOnlyMemory<byte>, ReadOnlyMemory<byte>, bool, int, ReadOnlyMemory<byte>, int)	Creates the outlines of the tables of a font program.

TrueTypeGlyphOutlines(ReadOnlyMemory<byte>, ReadOnlyMemory<byte>, bool, int, ReadOnlyMemory<byte>, int)

TrueTypeGlyphOutlines.cs

Creates the outlines of the tables of a font program.

public TrueTypeGlyphOutlines(ReadOnlyMemory<byte> glyf, ReadOnlyMemory<byte> loca, bool hasLongLocations, int glyphCount, ReadOnlyMemory<byte> horizontalMetrics = default, int horizontalMetricCount = 0)

Parameters

glyf ReadOnlyMemory<byte>: The glyf table.
loca ReadOnlyMemory<byte>: The loca table.
hasLongLocations bool: Whether the offsets of the loca table are 32-bit numbers (the indexToLocFormat of the head table is 1).
glyphCount int: The number of glyphs (the numGlyphs of the maxp table, or what the loca table gives).
horizontalMetrics ReadOnlyMemory<byte>: The hmtx table, or empty: the horizontal metrics of the glyphs.
horizontalMetricCount int: The number of glyphs that have their own advance in horizontalMetrics (the numberOfHMetrics of the hhea table).

Exceptions

ArgumentOutOfRangeException: glyphCount or horizontalMetricCount is negative.

Properties

Name	Description
GlyphCount	Gets the number of glyphs.

GlyphCount

TrueTypeGlyphOutlines.cs

Gets the number of glyphs.

public int GlyphCount { get; }

Property value

int

Methods

Name	Description
DecodeOutline(int, OutlineSink, GlyphScratch, GlyphBudget)	Decodes the outline of a glyph, in font units. A glyph identifier that is not a glyph of the font draws nothing.

DecodeOutline(int, OutlineSink, GlyphScratch, GlyphBudget)

TrueTypeGlyphOutlines.cs

Decodes the outline of a glyph, in font units. A glyph identifier that is not a glyph of the font draws nothing.

public void DecodeOutline(int glyphId, OutlineSink sink, GlyphScratch scratch, ref GlyphBudget budget)

Parameters

glyphId int: The glyph.
sink OutlineSink: The receiver of the contours.
scratch GlyphScratch: The buffers of the decoding (the points of the glyph and of its components).
budget GlyphBudget: The limits of the work of the decoding (the points, the components).

Exceptions

InvalidFontException: The data of the glyph is malformed.
FontResourceLimitException: The glyph exceeds the complexity limit or the allocation limit.